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human development
periods of developmemt
| Question | Answer |
|---|---|
| prenatal (germinal 1-2 weeks, embryonic 2-8 weeks, fetal 9-38 weeks gestation) | conception to birth (40 weeks) |
| infancy | birth to 2 yrs |
| childhood | 3-12 years |
| adolescence | 13-18 yrs |
| young adulthood | 19-40yrs |
| middle adulthood | 40-65 yrs |
| older adulthood | 65 - older |